Related Experiment Video
Updated: Sep 5, 2025
13:28
Gradient Strain Chip for Stimulating Cellular Behaviors in Cell-laden Hydrogel
Published on: August 8, 2017
8.1K
Hydrogel Swelling-Mediated Strain Induces Cell Alignment at Dentin Interfaces
David Fraser1,2, Tram Nguyen3, Alexander Kotelsky3
1Eastman Institute for Oral Health, Department of Periodontology, University of Rochester Medical Center, Rochester, New York 14620, United States.
ACS Biomaterials Science & Engineering
|July 6, 2022
Summary
This study engineered periodontal ligament cells (PDLCs) using poly(ethylene glycol) hydrogels. Hydrogel swelling induced PDLC alignment perpendicular to dentin, offering a novel method for tissue engineering.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Cell Biology
Background:
- Cell and tissue alignment is crucial for periodontal tissue function.
- Periodontal tissue engineering requires scaffolds that guide cell alignment relative to tooth root surfaces.
Purpose of the Study:
- To develop a method for controlling periodontal ligament cell (PDLC) alignment adjacent to dentin surfaces.
- To explore poly(ethylene glycol) (PEG)-based hydrogels as tunable matrices for directing PDLC activity.
Main Methods:
- A composite system of dentin blocks, PEG hydrogels, and PDLCs was created.
- PDLC alignment was controlled by manipulating hydrogel swelling.
- Predictive modeling and replication with various materials and cells were used to validate findings.
Main Results:
- Minimal hydrogel swelling resulted in random PDLC alignment.
- Hydrogel swelling induced PDLC alignment perpendicular to the dentin surface.
- The degree of alignment increased with increasing hydrogel swelling.
Conclusions:
- PDLC alignment is a biomechanical response to swelling-mediated strain.
- This study presents a novel method for inducing cell alignment adjacent to stiff surfaces via applied strain.
- The findings provide a model for studying and engineering aligned periodontal and other tissues.
